EP2034522B1

EP2034522B1 - Insulating panel for buildings, provided with an auxiliary unit, in particular a photovoltaic unit, and with improved means for supporting and holding the auxiliary unit

Info

Publication number: EP2034522B1
Application number: EP08163685.4A
Authority: EP
Inventors: Esterino Ceria
Original assignee: Isolpack SpA
Current assignee: Isolpack SpA
Priority date: 2007-09-10
Filing date: 2008-09-04
Publication date: 2014-06-11
Anticipated expiration: 2028-09-04
Also published as: EP2034522A3; US20090064606A1; US8006452B2; EP2034522A2; ITTO20070633A1

Description

The present invention refers to an assembly comprising :

i) a prefabricated insulating panel for obtaining outer surfaces of buildings, of the type having:
- a first sheet of rigid material, particularly metal material, having a plurality of substantially parallel longitudinal ribs that rise from a general plane of a respective face of the panel,
- a second sheet of rigid or semirigid material, particularly metal material, or, for example of paper or fibreglass, or another suitable material,
- a layer of insulating or lagging material between the first and the second sheet,
ii) at least one auxiliary panel unit, particularly a photovoltaic unit, resting and supported at least at, or in proximity of, its two opposed edges, on two main longitudinal ribs of said first sheet, in such a way that said auxiliary panel unit extends between said opposed edges at a distance from the aforementioned general plane of the insulating panel, and
iii) means to retain said auxiliary panel unit in position over said insulating panel.

An insulating panel having the characteristics indicated above is described in the European patent application EP 1 548 202 A2 by the same Applicant. The insulating panel that constitutes the object of said previous proposal consists of a prefabricated monolithic modular component, equipped with one or more auxiliary units, specifically photovoltaic units, and equipped with their respective connection cabling, ready for installation.
The use of panels of this type is advantageous, since the installation of such panels may be performed using methods similar to those envisaged for conventional panels, but such an installation achieves the dual result of, on the one hand, obtaining or equipping the outer surfaces of buildings, and in particular, roofs, and, on the other, of simply and easily obtaining the availability of a photovoltaic system without the need for a dedicated support frame, and with the advantage of being able to pre-assemble the auxiliary units on the insulating panels in the workshop, before installation of the insulating panels.
In the specific embodiment illustrated in EP 1 548 202 A2 , the means destined to hold each photovoltaic unit in position over the corresponding insulating panel comprise brackets attached to the insulating panel with screws. This solution is not wholly satisfactory, since it involves the creation of holes - to use the fixing screws of said brackets - in the structure of the insulating panel, which may not be desired, and which in any case requires the execution of time-consuming operations.
The purpose of the present invention is to improve the previously proposed insulation panel and, in particular, to render the means designed to retain each auxiliary unit on the corresponding insulation panel simpler and more functional.
With a view to achieving this aim, the object of the invention is an insulating panel having the characteristics of claim 1. Preferred characteristics of the invention are indicated in the dependent claims 2-15.
The panel according to the invention not only presents the advantages specific to the solution already proposed by the Applicant in EP 1 548 202 A2 , but also presents further advantages in terms of quickness of installation and safety, specifically with reference to the support and retention in position of the auxiliary units, even when they are of notable dimensions.
Further characteristics and advantages of the invention will now be described with reference to the annexed drawings, provided by mere way of non-limiting example, wherein:

figure 1 is a partial perspective view of a covering of a building using a plurality of assemblies according to the present invention,
figure 2 is a sectional view of an insulating panel of an assembly according to the invention, without the auxiliary unit,
figure 3 shows the detail of the joint between two juxtaposed panels,
figure 4 is a section corresponding to the section of figure 2, completed with a photovoltaic auxiliary unit and the means of electrical connection thereof,
figure 5 is a view corresponding to the view of figure 3, which partially shows the two photovoltaic auxiliary units associated with the two insulating panels that are placed side by side,
figure 6 is a perspective view of a first embodiment of a retention member for the photovoltaic auxiliary units that is part of the assembly according to the invention,
figures 7 and 8 are an end view and a side view of the member illustrated in figure 6,
figure 9 is a perspective view that illustrates the retention member of figure 6 after installation, and
figure 10 is a variant of figure 9 which illustrates a second embodiment of the retention member that is part of the assembly according to the invention.

In figure 1, reference number 1 indicates as a whole a covering for a roof of a building, obtained using a plurality of prefabricated insulating panels 2 according to the present invention, each extending over the whole dimension of the covering 1 in the longitudinal direction indicated by X in the figure. Insulating panels 2 are laid next to one another side by side, with their longitudinal edges in reciprocal contact, and several photovoltaic panel units 3 are mounted on each panel 2.
The general structure and the method of manufacturing of the insulating panels 2 are wholly identical to those described in EP 1 548 202 A2 by the same Applicant, and thus will not be described in detail here.
With reference to figure 2, each panel 2 comprises a first sheet 4 of rigid material, in particular a metal material, having a plurality of longitudinal ribs 5, 6, 7A and 7B, which rise from the general plane of the respective face of the panel, and a second sheet 8 of rigid or semi-rigid material, in particular a metal material. A layer of insulating or lagging material 20 is interposed between the two sheets 4 and 8, in a known manner.
In the case of the embodiment illustrated in figure 2, the longitudinal ribs prearranged on the first sheet 4 of the insulating panel 2 are of three types. A first type comprises longitudinal or transversal ribs (that is, orthogonal to the main ribs) 5, of reduced height, having substantially the function of increasing rigidity, and distributed uniformly and equidistantly across the width of the panel. A second type comprises two main longitudinal ribs 7A and 7B, on which two opposed edges of the respective photovoltaic auxiliary unit 3 rest (see figures 1 and 4). A third type comprises two auxiliary longitudinal ribs 6 that extend laterally and equidistantly in the area between the two main longitudinal ribs 7A and 7B, which are used both to support the respective photovoltaic unit 3 and to anchor retention members 9 adapted to engage and retain in position each photovoltaic unit 3 over the respective insulating panel 2.
As is clearly visible in figure 4, the main longitudinal ribs 7A and 7B extend in height above the plane on which the photovoltaic unit 3 lies and are shaped such that each defines a resting surface 10 (see figures 3 and 5) of the corresponding edge of the photovoltaic unit 3, and a surface 11 (see figures 2, 3 and 4) that delimits the seat for the photovoltaic unit 3 that is orthogonal to the resting surface 10.
As is also clearly visible in figure 4, the auxiliary longitudinal ribs 6 have instead a height that corresponds to the level of the resting surfaces 10, i.e., to the distance between the photovoltaic unit 3 and the general plane of the first sheet 4, and have a head surface 12 (see figures 2 and 4) on which the photovoltaic unit 3 rests.
Again with reference to the embodiment visible in figures 2-5, the wall defining the resting surface 10 of each of the main longitudinal ribs 7A and 7B, is connected to the plane of the sheet 4 by an inclined wall 13 (figure 5), while the vertical wall (with respect to the drawings) defining the surface 11 is prolonged into a projection 14 that includes a small horizontal wall, which then extends in a further vertical wall directed downwards (again with reference to the figures).
In the case of the first main longitudinal rib 7A, projection 14 projects beyond the respective side edge of insulating panel 2 and beyond the respective side edge of the insulating layer 20, while in the case of main longitudinal rib 7B, the projection 14 has the end thereof arranged flush with the longitudinal side edge of panel 2. Thanks to this configuration, two identical panels can be laid side by side as illustrated in figure 3, with projection 14 of rib 7A of one panel superimposed over the corresponding projection 14 of rib 7B of the other panel 2.
As may be seen in figures 3 and 5, once this superposition has been achieved, the respective photovoltaic units 3 associated to the panels that are juxtaposed can be held in position along the longitudinal edges of the panels by means of U-bracket elements 15, in metal material for example, that may be push-coupled over the superimposed projections 14 of the two panels, and which have respective wings 15a that can hold the longitudinal edges of the photovoltaic units 3 in position over their respective resting surfaces 10.
Again with reference to figures 2 and 3, the embodiment illustrated therein envisages auxiliary ribs 6 that present a transverse section that is essentially dovetail in shape, with two inclined side walls that rise from the plane of panel 4 and converge towards the top, to an area of minimum width after which the walls then diverge again until they join the head wall 12.
Finally, as is visible in figures 1, 2 and 4, each insulating panel 2 is equipped with at least one pipe element 16 for guiding cables 17 designed for the electrical connection of the photovoltaic unit 3. In a way similar to that envisaged in EP 1 548 202 A2 , the pipe element 16 is arranged inside insulating panel 2, within the insulating material 20 between the two sheets 4 and 8. In the specific case illustrated here, it extends inside one of the aforementioned auxiliary ribs 6 (which were not provided in EP 1 548 202 A2 ). Again analogously with the proposal illustrated in EP 1 548 202 A2 , an electrical connection box 3a is provided underneath each photovoltaic unit 3, to which the cables from the aforementioned pipe element 16 (figure 4) are connected.
As indicated above with reference to figure 1 of the attached drawings, quick-fit retention members 9 are anchored to auxiliary ribs 6, designed to retain each photovoltaic unit 3 at the edges that are transverse to the longitudinal direction X of the panels.
Figures 6-9 illustrate a first embodiment of one of said quick-fit retention members. In the case of this example, member 9 comprises a body in plastic material 17 with a main portion 17a designed to be anchored over a rib 6 of the insulating panel 2, and a cantilevered auxiliary portion 17b projecting over the main portion and defining a wall adapted to extend over a respective edge of a photovoltaic unit 3 (as may be seen in figures 1 and 9) in order to retain said unit in position. Main portion 17a of body 27 has a lower face in which a longitudinal groove 17 is defined, with a section of shape that substantially corresponds to the section of the auxiliary longitudinal ribs 6, allowing a shape coupling of member 9 over one of said ribs 6.
With specific reference to figure 7, the main portion 17a of body 17 has two wings 19 that define the flanks of rib 18 and are joined to the upper part of portion 17a by means of two parts of reduced thickness 21, which are defined by cuttings 22 formed in body 17 starting from the edges of the bottom wall of groove 18. A screw 23 passes through each of said wings 19, which screw engages with through-holes (not visible in the figure) formed through the full height of body 17. Each screw 23 is engaged in a nut 24 that is retained against rotation within a seat 25 of body 17 (figure 8).
For installation, each member 9 is slidingly mounted onto a respective auxiliary longitudinal rib 6, starting from one end of a panel, and it is then locked in position on said rib by tightening the screws 23. Tightening these screws causes in fact wings 19 to move upwards (with reference to figure 7), such that body 17 tightens over the respective rib 6, with the bottom surface 18a of the groove 18 thereof pressing against the head 12 of the respective rib 6, and by pressing through the wings 19 against the flanks of rib 6. In particular, wings 19 define a substantially X-shaped transverse section for groove 18, each flank of the groove having two converging inclined surfaces that fit at the corresponding inclined surfaces of the flanks of rib 6 (see figure 9).
Figure 10 illustrates a variant in which the main body 17a of the retention member 9 consists of two separate elements 171 and 172 that define rib 18 between them, and may be tightened together and against the two flanks of rib 6 by means of transverse screws 26. In this embodiment, each of the elements 171 and 172 has a cantilevered projecting auxiliary portion, defining a clamp with two jaws, 171a and 171b, and 172a and 172b, that may be tightened by means of respective screws 27 against the two opposed faces of the photovoltaic unit 3 so as to lock it in position. In the example illustrated in figure 10, also the shapes of the transverse section of auxiliary rib 6 and of groove 18 are slightly different to those illustrated in figures 6-9.
However, it is evident that the configuration of both the transverse section of auxiliary rib 6 and of the body of retention member 9 may be wholly different with respect to the above described one by mere way of non-limiting example.
As is evident from the above, the panel according to the invention is characterised by not only all the advantageous aspects of the solution previously described in EP 1 548 202 A2 , but also by the extreme simplicity and quickness of installation of the means to hold photovoltaic units 3 in position. Moreover, the proposed solution is further characterised by the fact that auxiliary ribs 6, prearranged in the panel for the purpose of providing the anchoring surface for the retention members 9, are also used to support the photovoltaic units 3 in their intermediate area between the two opposed edges that lie on the main ribs 7A and 7B, which fact ensures the stability of the assembly, even with large photovoltaic units.
Clearly, without prejudice to the principles of the invention, the construction details and the embodiments could widely vary with respect to what has been described and shown by mere way of example, without departing for this reason from the scope of the present invention.
It should be noted in particular that, although the invention has been described with particular reference to the use of photovoltaic auxiliary units, the use of the inventive solutions with auxiliary units of other types is absolutely not excluded.

Claims

An assembly comprising
- an insulating panel (2) to make outer surfaces of buildings, having
- a first sheet (4) of rigid material having at least one plurality of substantially parallel longitudinal ribs (5, 6, 7A, 7B) that rise from a general plane of a respective face of the insulating panel (2),

- a second sheet (8) of rigid or semi-rigid material,

- a layer of insulating or lagging material (20) between the first and the second sheet (4,8), and

- at least one auxiliary panel unit (3), resting and supported at least at two respective opposed edges on two main longitudinal ribs (7A, 7B) of said first sheet (4), such that said auxiliary panel unit (3) extends between said opposed edges at a distance from said general plane of the insulating panel (2), and

- retention means to retain said auxiliary panel unit (3) in position above said insulating panel (2), wherein said retention means comprise one or more quick-fit retention members (9), each comprising an engaging portion (17b) to retain said auxiliary panel unit (3) in a position thereof resting over the insulating panel (2),
characterized in that
- each quick-fit retention member can be anchored to said insulating panel (2) without making holes in the insulating panel (3) and/or in the structure of said auxiliary panel unit (3) for engagement of fixing elements such as screws,

- said first sheet (4) includes at least one auxiliary longitudinal rib (6) extending between said main longitudinal ribs (7A, 7B) and spaced apart from them, on which at least one of said quick-fit retention members (9) is anchored,

- each quick-fit retention member (9) and the respective auxiliary longitudinal rib (6) on which it is anchored have respective coupling parts with complementary transverse sections, to enable a shape coupling of said quick-fit retention member (9) over said auxiliary longitudinal rib (6) with possibility of sliding relative to said auxiliary longitudinal rib (6), but without the possibility of separation of the quick-fit retention member (9) from said auxiliary longitudinal rib (6), and

- on said at least one auxiliary longitudinal rib (6) the auxiliary panel unit (3) rests at an intermediate area thereof between said two opposed edges that rest on said main longitudinal ribs (7A, 7B).
Assembly according to claim 1, characterised in that said auxiliary panel unit (3) is a photovoltaic unit (3).
Assembly according to claim 1, characterised in that said quick-fit retention members (9) are arranged to be slidingly fitted on said at least one auxiliary longitudinal rib (6) of said insulating panel (2)and are provided with means (23, 19, 26) for locking them in position on the respective auxiliary longitudinal rib (6).
Assembly according to any of claim 1-3, characterised in that said quick-fit retention members (9) have the engaging portions (17B) thereof engaged over end edges of said auxiliary panel unit (3) that are transverse with respect to said longitudinal ribs (5, 6, 7A, 7B).
Assembly according to claim 1, characterised in that said at least one auxiliary longitudinal rib (6) has a head wall (12) parallel to the general plain of said first sheet (4) and two lateral walls recessed with respect to side edges of said head wall.
Assembly according to claim 5, characterised in that said at least one auxiliary longitudinal rib (6) has a transverse section with a substantially dovetail shape.
Assembly according to any of the preceding claims, characterised in that each quick-fit retention member (9) has a body (17) having a main portion (17a) in which a longitudinal groove (18) is formed, said groove having a section that corresponds to the transverse section of the respective auxiliary longitudinal rib (6), for the shape coupling over said rib, and at least one secondary cantilevered portion (17b) projecting beyond said main portion (17a), that defines the aforementioned engaging portion (17b) to retain the auxiliary panel unit (3) over the insulating panel (2).
Assembly according to claim 7, characterised in that
- said main portion (17a) of the body (17) of the retention member (9) has at least one part (19) configured as a clamp and provided with at least one screw (23) to tighten it over the respective auxiliary longitudinal rib (6), , and/or

- the body (17) of the retention member (9) has two cantilevered secondary portions (171a, 171b; 172a, 172b) projecting from said main portion (171, 172), that may be tightened as a clamp by means of at least one screw (27) over opposed faces of said auxiliary panel unit (3).
Assembly according to claim 8, characterised in that
- said part configured as a clamp (19, 23) is arranged on one or both flaks of said longitudinal groove (18) and is engaged by a tightening screw (23) that is orthogonal to the plane in which the insulating panel (2) lies, and/or

- said main portion (17a) of the body (17) of the retention member (9) consists of two separate elements (171, 172) that together define the aforementioned longitudinal groove (18) and that may be locked together over said auxiliary longitudinal rib (6) by means of one or more tightening screws (26).
Assembly according to claim 1, characterised in that said main longitudinal ribs (7A, 7B) extend in height above the plane on which the auxiliary panel unit (3) lies and are shaped such that each defines a resting surface (10) of a corresponding edge of the auxiliary panel unit (3) and a surface (11) that delimits a seat for the auxiliary panel unit (3), orthogonal to said resting surface (10),
while said at least one auxiliary longitudinal rib (6) has a height corresponding to the distance of the auxiliary panel unit (3) from the aforementioned face of the insulating panel (2), so as to define with a head surface (12) thereof, a resting surface for an intermediate area of the auxiliary panel unit (3).
Assembly according to claim 10, characterised in that two of said main longitudinal ribs (7A, 7B) are provided, that extend along two opposed longitudinal edges of said insulating panel (2).
Assembly according to claim 10, characterised in that a first one of said main longitudinal ribs (9A) has an upper portion that defines the aforementioned orthogonal surface (11) delimiting the seat for the auxiliary panel unit (3) that projects laterally from the insulating panel (2) and from a corresponding side surface of the layer of insulating material (20), and
in that the second main longitudinal rib (7B), that is arranged along an opposite longitudinal edge of the insulating panel (2), has an upper portion that defines the aforementioned orthogonal surface (11) delimiting the seat for the auxiliary panel unit, that terminates substantially flush with the corresponding side edge of the insulating panel (2) and of the layer of insulating material (20),
such that several identical insulating panels (2) may be laid side by side with the longitudinal edges thereof next to, and in contact with, one another, and with the projecting portion of said first main rib (7A) of an insulating panel (2) superimposed to said second main longitudinal rib (7B) of another insulating panel (2).
Assembly according to claim 12, characterised in that it has associated thereto a U-bracket element (15), adapted to be fitted over the superimposed ribs (7A, 7B) of two insulating panels (2) arranged side by side and provided with wings (15a) that can rest over the auxiliary units (3) associated with said panels, to maintain said units in position over the respective insulating panels (2).
Assembly according to claim 1, characterised in that each of said main longitudinal ribs (7A, 7B) extends from the general plane of the first sheet (4) with a first inclined wall (13) that is prolonged in a second wall, parallel to the plane of the first sheet, that defines said resting surface of the panel (3), and which in turn is prolonged in a third wall orthogonal to said second wall and that defines said surface (11) delimiting the seat for the auxiliary panel unit, said third wall in turn being prolonged in a fourth wall parallel to the plane of the first sheet and then being prolonged towards the plane of the first sheet with a fifth wall substantially orthogonal.
Assembly according to any of the preceding claims, characterised in that said first sheet (4) comprises a plurality of said auxiliary longitudinal ribs (6) substantially equidistant from one another in a space between two said main longitudinal ribs (7A, 7B).